DNS contains the names of computers called hosts, and the IP addresses associated with them. traditionally, you would have to create a DNS entry for each computer on your network, which you know it can be time consuming if you have many computers.
Another issue that quickly arises by entering DNS entries manually is that your list of Hosts on DNS quickly gets outdated if your are using DHCP to assign IP addresses, because everytime DHCP assigns a different IP address to a host, you will need to update the new change on your DNS list.
Luckily, DHCP has a mechanism to do this work for you, is called dynamic DNS. when this option is checked on the DHCP server, everytime there is a change on IP address configuration on a host, DHCP automatically makes the update on the DNS list, they are synchronized.
If you are using DHCP on your network, no doubt, you need to check this function is enabled on your DHCP server. otherwise, you will develop headaches by manually updating the hosts list.
To check the option is enabled, login to your server and click on Start>All Programs>Administrative Tools>DHCP right click on the root of your DHCP server ( that is your top domain name) once the general property come up, click on the DNS tab:
Make sure, the option “Enable DNS dynamic updates according to the settings below. also make sure the following options are checked:
- Dynamically update DNS and PTR records only if requested by the DHCP clients.
- Discard A and PTR records when lease is deleted
If those settings are already checked on your DHCP server, you’re all set. sit back and relax. Watch DHCP do the work for you.
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